There is no miracle recipe it depends mainly on your desires and your budget. For our part, we have given ourselves a week to write a list of a dozen countries each on our own.
At the end of these few days, we shared our lists and we were able to draw the first elements from them. We agreed on 7 countries and it was already a good start: Thailand, Burma, Laos, Cambodia, Indonesia, Argentina, Bolivia
After negotiations, Sri Lanka, New Zealand and Brazil were added. We knew from the beginning that we couldn’t do everything, so we put North America and Africa aside. This is your first trip, you want to do things right and not rush anything, it’s not a race!